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Improving eciency of EMC ImmunityMonitoring of RBS using a FPGA basedinstrument
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Signals and Systems Group.
2014 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

A test system for Immunity testing of Ericsson's LTE radiobase station (RBS) was built using a National Instruments(NI) PXI chassis tted with a vector signal transceiver (VST)module and a PC controller module. A program made in Lab-VIEW and MATLAB was run on the controller module in thePXI chassis. The tasks of the program was, on one hand, tocontrol the VST which was used to record the signal emittedfrom the RBS and on the other hand, to process the signal anddetermine its quality by acquiring the bits transmitted. Functionalityenabling the VST to transmit a given signal was alsoincluded in the program. The built system performed up toninety times faster than the old system but lacked turbo decodingnecessary to correctly determine bit error ratio (BER)and block error ratio (BLER). The performance of the systemleaves room for adding time consuming processes such as turbodecoding later on and by examining the undecoded bits the signalquality can still be measured. The program handles both1tx and 2tx signals.

Abstract [sv]

Ett testsystem för immunitetstestning av Ericssons LTEradiobasstation(RBS) byggdes med ett PXI-chassi från NationalInstruments (NI) som bestyckades med en vector signaltranceiver (VST) modul och en PC-controller-modul. Ett programskapat i LabVIEW och MATLAB kördes på controllermoduleni PXI-chassit. Programmets uppgift var dels att kontrolleraVST:n vilken användes för att spela in signalen somRBS:en sände ut och dels bearbeta den inspelade signalen ochavgöra dess kvalitet genom att ta fram de databitar som skickats.Funktionalitet för att låta VST:n sända en bestämd signalinkluderades även i programmet. Det byggda systemetpresterade upp till nittio gånger snabbare än det gamla systemetmen saknade turboavkodning, något som är nödvändigtför att beräkna bitfelsratio (BER) och blockfelsratio (BLER) påett korrekt sätt. Programmets snabbhet lämnar utrymme föratt lägga till mer tidskrävande processer som turboavkodningvid ett senare tillfälle och genom att studera de icke avkodadedatabitarna kan signalens kvalitet fortfarande mätas. Programmethanterar både 1 tx och 2 tx singaler.

Place, publisher, year, edition, pages
2014. , 41 p.
Series
UPTEC F, ISSN 1401-5757 ; 14017
Keyword [en]
LTE, Immunity testing, Ericsson, National Instruments, VST, PXI, FPGA
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:uu:diva-224028OAI: oai:DiVA.org:uu-224028DiVA: diva2:714906
External cooperation
Ericsson
Educational program
Master Programme in Engineering Physics
Presentation
2014-04-23, Å 2003, Lägerhyddsvägen 1, Uppsala, 17:40 (Swedish)
Supervisors
Examiners
Available from: 2014-05-13 Created: 2014-04-29 Last updated: 2014-05-13Bibliographically approved

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